196 DESCRIPTION OF A NEW SPONGE. 



tinctly wrinkled across, less deeply foveated at the base, foveas 

 impunctate ; elytra more coarsely punctate-striate than in 

 paludosusj the two striae not obsolete at the sides and the apex, 

 impressions on the third striae from the suture ; eyes black ; 

 antennae of the colour of the body ; legs and trophi a shade 

 paler. 



The marking of the elytra is altogether of a coarser charac- 

 ter than in pahidosus, and the striae are apt to run into those 

 abnormal connections observable in Omaseus melanarius and 

 other strongly sculptured Carabi. 



Near Berwick, Dr. Johnston. 



Description of a New British Sponge. By Doctor Johnston. 

 Halichondria macularis. 



Sponge forming a thin circular spot one or two lines in thick- 

 ness, and rather more than an inch in diameter, of a wax-yel- 

 low colour, spongious texture, but not reticular, and soft when 

 recent ; the surface even, somewhat hirsute, with pores invisi- 

 ble or scarcely visible to the naked eye, and no fecal orifices. 

 Spicula numerous, long and straight, needle-shaped, smooth ; 

 they are all alike in figure and do not much difi*er in length. 



This is amongst the least attractive of its genus. The only 

 species to which it is closely allied is the Halichondria san- 

 guinea J from which it is distinguished by its colour and less 

 fleshy texture, and by the straitness of the spicula. These 

 are remarkable for their length ; and the obtuse head is very 

 slightly sinuated a little below the extremity, but it requires 

 a high magnifier to discover this character. 



This new species was found spreading, lichen-like, on the 

 inner surface of an old valve of Cyprina islandica, which was 

 brought up, from a depth of about 35 fathoms, by the baited 

 lines of our fishermen. 



